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CC3220SF: CC3220SF Serial Flash

Jejomar Ildefonso
Expert 8800 points
Part Number: CC3220SF

Hi Team,

Posting for our customer. They intend to use CC3220SF in their project. From our understanding of the datasheet, the Serial Flash (NOR) with maximum size of 256KB is required for storing Application code, WIFI credential and so on. But along with this flash they want to use 1GB NAND flash for caching media

Is it possible to use Serial Flash SPI interface for both NOR and NAND ICs in SPI sharing mode using CS? The intention is to run Application code from Internal flash (1MB) which is available in CC3220SF.

Thanks in advance!


Kind Regards,

Jejomar

  • 0
    Guru 75785 points

    Hi Jejomar,

    External serial flash sFlash is mandatory for function of CC32xx devices. Maximum size of this flash is 16MB and this flash is connected via dedicated SPI flash interface and network coprocessor (called NWP). Access to this SPI flash can be done via sl_ filesystem API. There is no direct access to this flash via application code, only via NWP.

    In case of user want to use additional memory chip, he can use SPI interface which is available for application processor. Another option can be use SD card.

    Jan